Kawasaki Vulcan Forum banner

1 - 8 of 8 Posts

·
Registered
Joined
·
6 Posts
Discussion Starter #1
Hi all.
My carb was fixed for a gas leak. Since then, there is an irregular "pop" sound from the second I start the engine. You can hear it more when driving slow, when idle or when decelerating. It is pretty continuous but it is irregular (meaning the interval between the pops can be less than a second and up to 3 seconds).
What might be causing it?

Thanks
 

·
Registered
Joined
·
266 Posts
Any other symptoms? Sluggish throttle response, incorrect idle, anything? Does the pop seem to always come from one side or both?

It could be an improper air/fuel mix adjustment, but it also could be a float sticking on one side.

A few more details can go a long way...
 

·
Registered
Joined
·
6 Posts
Discussion Starter #3
Thanks for the quick response.
It runs completely normal most of the time if the engine is warm.
The only time I feel a real difference is when it is very cold and I didn't allow it enough time to worm up. It will then have troubles when I just start moving from a full stop by chocking and then pops and jumps forward.
The idle seems correct and I think the pop is more to the right side than the left but I can't say for sure (the side that was fixed in the carb was the left).
I can try and video record it later if it helps.
 

·
Registered
Joined
·
266 Posts
Yes, a video might help.

Also, check all of your vacuum lines to make sure they are installed correctly. An open vacuum port or leaky line can make all sorts of strange symptoms appear. Since the carbs have been off, double check the boots where the carbs mount to the engine and airbox as well.

I'm pretty surprised that whoever repaired your carbs didn't repair both at the same time. That's usually pretty standard procedure. Did you have this done at a shop or someone you know or??
 

·
Registered
Joined
·
6 Posts
Discussion Starter #5
Thanks for the quick response.
It runs completely normal most of the time if the engine is warm.
The only time I feel a real difference is when it is very cold and I didn't allow it enough time to worm up. It will then have troubles when I just start moving from a full stop by chocking and then pops and jumps forward.
The idle seems correct and I think the pop is more to the right side than the left but I can't say for sure (the side that was fixed in the carb was the left).
I can try and video record it later if it helps.
I tried recording it but the normal sound makes it impossible to hear the abnormal one. But I did find out that you can really feel air bursts from the left exhaust (the side that the carb was fixed).
I will have to see if it sits correctly in its place.

It wasn't fixed by a pro but by a friend. Sadly, I can't afford a mechanic right now.
 

·
Registered
Joined
·
266 Posts
Understandable about the mechanic costs NuFlood. If I wasn't one myself, I'd never be able to afford a tenth of what I do. As crazy as it sounds, gotta love growing up, well, broke. Keep us posted on what you find and we will keep on with help tips and advice...
 

·
Registered
Joined
·
68 Posts
Could that be a synchronicity issue? If one carb was rebuilt and not the other, the vacuum characteristics could have conceivably changed and caused it to have that low end or idle irregularity.
 

·
Registered
Joined
·
266 Posts
Could that be a synchronicity issue? If one carb was rebuilt and not the other, the vacuum characteristics could have conceivably changed and caused it to have that low end or idle irregularity.
That is a possibility. Both carbs had to be removed for servicing the one side, which is why I'm very surprised only one was serviced. My current line of thought is checking the most common issues first... vacuum/air leakage at one of the attachment points, either boots or hoses. After that we move on to sync, air/fuel ratio, etc.
 
1 - 8 of 8 Posts
Top